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Quantitative observations of a deep-sea hydrothermal plume using an acoustic imaging sonar

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TitleInfo
Title
Quantitative observations of a deep-sea hydrothermal plume using an acoustic imaging sonar
Name (type = personal)
NamePart (type = family)
Xu
NamePart (type = given)
Guangyu
NamePart (type = date)
1985-
DisplayForm
Guangyu Xu
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Bemis
NamePart (type = given)
Karen G.
DisplayForm
Karen G. Bemis
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Chant
NamePart (type = given)
Robert J.
DisplayForm
Robert J. Chant
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Adams
NamePart (type = given)
Diane K.
DisplayForm
Diane K. Adams
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Jackson
NamePart (type = given)
Darrell R.
DisplayForm
Darrell R. Jackson
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = personal)
NamePart (type = family)
Di Iorio
NamePart (type = given)
Daniela
DisplayForm
Daniela Di Iorio
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (encoding = w3cdtf); (qualifier = exact)
2015
DateOther (qualifier = exact); (type = degree)
2015-10
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2015
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
The Cabled Observatory Vent Imaging Sonar (COVIS) is used to quantitatively monitor the hydrothermal discharge from the Grotto mound, a venting sulfide structure on the Endeavour Segment of the Juan de Fuca Ridge. Since its deployment in September 2010, COVIS has recorded a multi-year long, near-continuous acoustic backscatter dataset. Further analysis of this dataset sheds light on the backscattering mechanisms within the buoyant plumes above Grotto and yields quantitative information on the influences of oceanic, atmospheric, and geological processes on the dynamics and heat source of the plumes. An investigation of the acoustic scattering mechanisms within the buoyant plumes issuing from Grotto suggests the dominant scattering mechanism within the plumes is the temperature fluctuations caused by the turbulent mixing of the buoyant plumes with the ambient seawater. In comparison, the backscatter from plume particles is negligible at lower levels of the plume but can potentially be signi cant at higher levels. Furthermore, this finding demonstrates the potential of inverting the acoustic backsatter to estimate the temperature fluctuations within the plumes. Processing the backscatter dataset recorded by COVIS yields time-series measurements of the vertical flow rate, volume transport, expansion rate of the largest buoyant plume above Grotto. Further analysis of those time-series measurements suggests the rate at which the ambient seawater is entrained into the plume increases with the magnitude of the ambient ocean currents---the current-driven entrainment. Furthermore, the oscillations in the ambient ocean currents that are driven by tidal and atmospheric forcing are introduced into the flow field within the plume through the current-driven entrainment. An inverse method has been developed to estimate the source heat transport driving the largest plume above Grotto from its volume transport estimates. The result suggests the heat transport driving the plume was steady over the 41-month period between October 2011 and February 2015. Comparing the current and historical heat transport measurements with contemporaneous seismic data suggests the evolution of the heat transport since 1988 correlates with the rate of local seismicity with a short episode of increased heat transport following pronounced seismic events and reduced steady heat transport during time periods of quiescent seismicity.
Subject (authority = RUETD)
Topic
Oceanography
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_6652
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Note
Supplementary File: Spreadsheet A. Particle Sample Analysis Summary
Extent
1 online resource (xxiv, 174 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Subject (authority = ETD-LCSH)
Topic
Hydrothermal vents
Subject (authority = ETD-LCSH)
Topic
Sonar
Note (type = statement of responsibility)
by Guangyu Xu
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T39C70F5
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Xu
GivenName
Guangyu
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2015-08-11 11:14:23
AssociatedEntity
Name
Guangyu Xu
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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Technical

RULTechMD (ID = TECHNICAL1)
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ETD
OperatingSystem (VERSION = 5.1)
windows xp
RULTechMD (ID = TECHNICAL2)
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ETD
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